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Re: Using larger power transformers in low power-draw source components

Hi, Dan,

Perhaps I can comment on your reply, as well as answering the Qs you had:

* "Most low VA rated toroidal transformers have poor regulation specs vs. a higher VA rated toroidal transformer."

Good point ... I would think this would result in the sound being "cleaner" but why would it deliver more "substance/heft" to the sound?

* "Is the power supply configuration in the unit adaptable to this?"

Sorry, don't understand the Qu.

* "Does the transformer secondary have a centre tap to ground?"

Yes.

* "Therefore current is reduced by half."

Yes, but the original 30VA transformers delivered 1 amp at 15v on each secondary. The current draw on each rail (measured) is 65ma ... so I would've thought 1 amp was plenty. I replace the 30VA transformers with 160VA 15-0-15v transformers, which are able to deliver 5.3 amps on each secondary.

* "How well is the transformer coping with the capacitative load of the power supply?"

I don't know.

The power supply is designed for small constant-current-draw source components, not power amps. It has a 680uF cap for each rail directly after the diode bridge (10 x expected output current), then rail regulation is done by an emitter follower transistor.

Hope this info helps.

Regards,

Andy



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